Last week a caller to my radio show asked that I explain the word “mast.” “I’ve often heard you use the term, but I’m not sure exactly what it means,” she said. It’s a great question, especially at this time of year.

With the 100th anniversary of the extinction of the passenger pigeon fresh on our minds, I’m pleased to report an easy and inexpensive way that everyone can help prevent future extinctions of wildlife by simply mailing a letter.